docs: def unique(new_cmp_dict, old_cmp_dict):
      """Return a list dict of
         the unique keys in new_cmp_dict
      """
      newkeys = set(new_cmp_dict)
      oldkeys = set(old_cmp_dict)
      unique = newkeys - oldkeys
      unique_ldict = []
      for key in unique:
          unique_ldict.append(new_cmp_dict[key])
      return unique_ldict